锡贫中矿回转窑还原挥发试验研究  

Reduction volatilization of low-grade tin ore in rotary kiln

作　　者：张驰 邱文顺 吴红星 ZHANG Chi;QIU Wen-shun;WU Hong-xing

机构地区：[1]云南锡业股份有限公司,云南个旧661000

出　　处：《中国有色冶金》2021年第4期74-78,共5页China Nonferrous Metallurgy

摘　　要：本文结合SnO易于挥发的特性及回转窑适合处理固态物料的特点,对难处理的锡贫中矿进行了熔点测试、制粒和不制粒对比试验、物料制粒条件试验及连续进出料试验等,以探索锡贫中矿回转窑还原挥发工艺。据理论分析及熔点测试试验,还原挥发控制的合适温度为900~1100℃,且加入CaO黏合剂有助于提高锡贫中矿熔点温度,有利于锡还原挥发;采用回转窑还原挥发处理锡贫中矿可实现锡与其他杂质物料的有效分离,挥发率可达到88.85%以上。Given that SnO is volatile and rotary kiln is suitable for handling solid materials,tests are conducted to explore the reduction volatilization process of refractory low-grade tin in rotary kiln,including melting point determination test,comparison test between pelletizing and not pelletizing,feed pelletizing orthogonal test and continuous feeding and discharging test.Conclusions drawn from these tests are that according to theoretical analysis and melting point determination test,the proper temperature of reduction volatilization should be controlled at 900~1100℃,and the adhesive CaO is beneficial to increasing the melting point of low-grade tin middlings and reduction volatilization of tin.And this process can realize effective separation of tin from other impurities and a volatilization rate of over 88.85%.

关 键 词：锡贫中矿 还原挥发 回转窑 熔点测试 熔点温度 CaO黏合剂 挥发率 

分 类 号：TF814[冶金工程—有色金属冶金] TF803.11